Molded case switch having improved performance and single-phase protection
CA 1191934 A · Owner: Westinghouse Electric Corporation · Inventors: Wafer, John A.; Maier, Alfred E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective system for a circuit having a fuse and a switch serially connected in the circuit. The switch has separable contacts and a flux-transferring trip mechanism which upon being energized cause the switch contacts to thereby open. The switch contacts once opened are mechanically interlocked and may not be closed until the switch has been reset. A transformer is connected across the fuse with the output of the transformer being connected to a rectifying circuit, thereby producing a direct current output when the fuse blows. When the fuse blows a voltage is generated across the fuse at a predetermined rate thereby producing a direct current output which then energizes the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.